Electrode for electric furnaces.



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UMTED STATES PATENT OFFICE. f

rAUnsEJoURNE'noF PARIS, Asslenon 'ro sooinrn nnno'rieonm'riiLLunfn` 4 vemule:nkmifircnrsia.or FRoGEs, ISERE, FRANCE. s

' EnEc'rnonnron/ ELECTRIC Funivnons `Be it known that I, PAUL SEJOURNT, a

, subject of theRepublic of France, of 109 Boulevard Haussmann, Paris, France, have invented certain new and useful Improve- `ments `Relating to Electrodes for Electric Furnaces, of which thefollowingis-.a` speciication.r

` f rThepresent invention consists ina method 1o` naces for y electrometallurgical orV f ele'ctro f chemical operations andis morepart1'cularlyy appli-cable `to the case' inywhi'ch each"` elecl trode consists of'several conducting memfor connecting the electrodes of electric fur- -bersl 7 f f i y i n The object of this method of connection; is to be able to lead the current into kka mobile i central member which mechanically connects the several -component'parts of the electrode and (a) insures'a suitable distribution off the electriccurrent in the different parts of n the members constituting the electrode, (b)

utilizes thevgreatestpossible length of elecf i trode. 25

4These results are Vobtained by providing the lower end `of the leadingln member with extensions equal in number to that of the carbons a by a stem d of cruciform sec-,

the several components v'of the electrode -eac'h extension engaging in a recess provided in one of the components up to thepoints farthest troni-the center of the electrode, the

extension being made solid with the com` ponent` of the electrode byv asuitable con kducting agglomerate'. y

The accompanying drawings show by Way oi' example Lmeans for carrying out theinvention in the caseiof an electrode in four parts. n

Figure lis a vertical section of the elec trode by a diagonal plane, f

Fig. 2 is a plan view, f Fig. V3 is an elevation partly in section and Fig. 4 la section on the line X-Y-Z f of Fig. 3 of a modified construction;

Fig. 5 shows the grouping of several electrodes.

`In Figsfl and 2 a representsA the upper .f ends of the carbons rwhich constitute the` electrode.` They vare each provided with a diagonal groove or recess b.

The currententers bya plate c `joined to `tion connected with exibl'e conductors which allow the parts to Specificationy of Letters Patent.

\ parts. g tained 'with this member' along the two'j `diagonals of the mono blck electrode the density of the current being as homogeneois be raised and low#- of theseA grooves is sensiblyv greater than thatofthe extensions, an intimate Contact between they parts being insured by means of a joint made by running in metal f and by a sealing conductor g. Finally-the whole is protected v by la 5 covering 7L of `refractory material; "The member d comprises besides means ki vfor clamping thezcables and `for `fixing the suspension hook ofthe'electrode a system 'of n y k,1 au=simtei1yseptic, 19,19. Application med ncember`9,"'191s. serial No. 265,916. i

circulating water kfor cooling.` In the exam-y f v ple shown' this-water enters the plate lc at l,

descends in the left' side `by the'passage 2,

*circulates 1in theeo'rresponding extension, passes at 3 into the rear side,'fascendsat 4,

passes to the right at 5, descends, is led yaty '.G''intothe forwardextension, ascends', and finally is discharged at 7 f In the modification represented iny 3 are and 4;. the extensions k of the member cylindrical and their outer lends are screw threaded. f p n l At the-upper portion of each of the car- 'bons there is a hole Z of a diameter greater thanthat of the parts k' and the portionk toward the center, preferably forms a recess v which allows a joint of carbon paste g to be easily made. The-carbone are introduced separately in the extensions.

The contact between the cylindrical `ex-y tensions and the .carbons is insured by a -kind `of gland formed of a washer m., of a granular conducting composition p and of a screw nut n by which it is compressed; the nut and the washer m are adjusted in the holes of the carbons. The freespace on the exterior is filled with a carbon paste at r and a covering of refractory material t is arranged as 1n the former case. A water cir-v culation as described above completesthe arrangement. Y It is t0 be remarkedthat the connecting piecewith sealing paste is suitable for elec'-v trodes which are mono block rojundI or n square, aswell as those composed of four The distribution of current is'` obas the nat're'of the currentemployed will in Case of ingitu'diai essuressuseeptgibie 'er localizing the passage of the current, there is rio-riskof-abnormal densities in certain parts of the electrodes4 which'Withstrictly4 axial connections often lead tothe fracture of the electrode.

lAlso bothconstructions of the connecting members allow of a convenient arrangement of several electrodes connected together.for..`

Very great current strengths.

In Figo .is shown anfarrangementjof sev- .i `eralco-mpound electrodes connected; on the same principle.

All i the leading-in members v*have their upper plates'at the sameheight and the comci, c?, ciz c? are assembled f pound electrodes tion sealingsaid extensions .in positionf 52,.l Means accordlng toclaim 1,and an en- 5 v veloprefractory vmateriaLin which the elec-v f trodes aresurrounded. jk

y3. Means according :toclaim l', and means for providlng a Water .circulation 1n the exf 4. Means according to claim 1, the eXten- 1 sions of themember for leading in the current being cylindrical and engaging in cylindical recesses provided in the heads of the e1ectrodes,a granular composition surroundving the' extensions and nuts threaded on to the outerends of the extensions for com- .pressing said granularcomposition', substantially as described. o

. 5. Means-according to claimvl, and means .for providing a Water circulation in each of the extensionsof said member.4

6. Means for distributing'the-current yin electrodes ,of electric furnaces, comprising a f plurality of members for leading 1n the current, havingf extensions adaptedto engage ydiagonally arranged ,recesses lprovided at vtheupPerends-ofthe: electrodes, and a conducting composition setting said extensions 4.invpositiongf.and a bridge piece for yconnecting-said members. p

In Witness whereof, I have hereunto signed -myrilarne` f i 'PAUL esEJ-oUmuir.`

` .0pt-'tml potent l?? bfinedfw `five` cents each, byhaiidnrsipingffommissonei of Patents, 

